It can be done but its a pain in the ass with the potential to lose money. Maybe you can find a sunfire for $800, spend a day cleaning it, put new brakes on it for $200 in parts, maybe 2 new tires or something for $200, and now you have a car that you have $1200 into. Maybe you can sell it to some schmuck for a tick over $2k, for an $800 profit, not including gas and time youve wasted. Then again, you could have the thing sitting in your yard for 3 months and finally sell it for a grand to get rid of it. Plus you need to keep in mind that if you’re dealing with cheap cars you’re going to be dealing with a lot of fuckups and retards.